Exercise bicycle



FIG. 1 is a perspective view of an exercise bicycle showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof, viewed from the right in FIG. 1;

FIG. 5 is a right side elevational view thereof, viewed from the left in FIG. 1;

FIG. 6 is a top plan view thereof; and

FIG. 7 is a bottom plan view thereof. 

The ornamental design for an exercise bicycle, shown and described. 